Overview
ISO 13950:2007 - Plastics pipes and fittings: Automatic recognition systems for electrofusion joints - specifies the characteristics and procedures for automatic recognition systems that enable automatic energy delivery to thermoplastic electrofusion fittings. The standard covers numerical recognition (bar codes, magnetic cards), electromechanical recognition (implanted-resistor connectors) and self-regulation systems used during electrofusion jointing of plastics piping for gaseous fuels, water for human consumption and other fluids.
Key normative material and informative annexes (A–E) explain bar‑code formats, magnetic‑card encoding, implanted‑resistor connectors and the self‑regulation detection method. ISO 13950:2007 supersedes ISO/TR 13950:1997.
Key topics and technical requirements
- Recognition methods
- Numerical recognition: bar codes and magnetic cards encode fusion parameters and identification data for automatic reading by fusion control units.
- Electromechanical recognition: implanted‑resistor connectors where an implanted resistor in a terminal pin is read to determine fusion time.
- Self‑regulation: sensors detect molten material/pressure at calibrated wells to automatically terminate the fusion cycle.
- Bar code formats
- Accepts 24‑digit or 32‑digit “2‑in‑5” interleaved codes (thick/thin bar ratio 2.5). Annex A and B define digit content and checksum structure.
- Magnetic cards
- ID‑1 card physical characteristics per ISO/IEC 7810 and encoding tracks defined per ISO/IEC 7811‑2 and 7811‑6. Fusion programmes and records stored on tracks (up to 90 characters); cards should not be reused after a successful recorded fusion.
- Fusion parameters & definitions
- Nominal/real fusion time, fusion voltage/current, nominal/real fusion energy, and resistance definitions (nominal, identification, measured) are standardized for consistent control and traceability.
- Limits and machine requirements
- Control units must document maximum deliverable energy, supported programmes, adaptable parameters, and emergency/stop criteria.
Applications
- Ensures safe, repeatable electrofusion joints in:
- Gas distribution networks
- Drinking water and raw water piping
- Industrial fluid piping and general‑purpose thermoplastic systems
- Enables traceability, quality assurance and automated fusion cycles on site and in factory assembly.
Who should use this standard
- Manufacturers of electrofusion fittings and fusion machines
- Pipeline contractors and installers performing electrofusion jointing
- Quality assurance and inspection bodies in water and gas utilities
- System integrators implementing fusion control and data logging
Related standards
Keywords: ISO 13950, electrofusion joints, automatic recognition systems, plastics pipes and fittings, bar codes, magnetic cards, implanted‑resistor connectors, self‑regulation, fusion control.